New in Symfony 4.1: Ignore specific HTTP codes from logs

Logging as much information as possible is essential to help you debug the
issues found in your applications. However, logging too much information can be
as bad as logging too little, because of all the "noise" added to your logs.

That's why in Symfony 4.1 we've improved the Monolog integration to allow you
exclude log messages related to specific HTTP codes. For example, when using a
fingers_crossed handler, use the following configuration to ignore the logs
about 403 and 404 errors: